Scala 3.8.2 release

som-snytt · February 26, 2026, 10:05am

Showing old and new desugaring in a test:

tests/run/i25077.scala

main

def f(x: Int): (Int, Int) = (1, x)

val result: Iterable[(Int, Int)] =
  for
    (k, v) <- Map(1 -> 1, 2 -> 1, 3 -> 1)
    x      = k + v
    (a, b) = f(x) // warn previously map would have changed result type
    (y, z) <- Map(42 -> 27)
  yield (a+y, b+z)

@main def Test() =
  assert(result.size == 1, s"Expected 1 only, got ${result.size}")
  assert(result.head == (43, 31), result.head)

/*
3.8

    val result: Iterable[Tuple2[Int, Int]] =
      Map.apply[Int, Int](
        [ArrowAssoc[Int](1).->[Int](1),ArrowAssoc[Int](2).->[Int](1),

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